%0 Journal Article
%T LASING WITHOUT INVERSION AND ORIGIN OF GAIN IN A Λ SYSTEM
%A 张登玉
%J 中国物理 B
%D 1997
%I 
%X A three-level Λ-type atomic system is pumped by an incoherent radiation field. The system lases without population inversion in the steady state. We analyze the inversionless gain and origin of the gain.
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=CD8D6A6897B9334F09D8D1648C376FB4&aid=945A49DB7CD876ACAFF270246FDB23A9&yid=5370399DC954B911&vid=B31275AF3241DB2D&iid=0B39A22176CE99FB&sid=08805F9252973BA4&eid=6700D0D256586E73&journal_id=1009-1963&journal_name=中国物理&referenced_num=0&reference_num=0